These are the photos of the cylinder head and engine block, soon after removal of the head.
Some of the photos and cropped and uploaded to the forum & the other's in the google photos with the links.
They are uncropped and in it's original high resolution and size.
For the most part, the failure of the gasket was due to head bolts coming loose. It was too easy to
undo more than half of the head bolts. I remember re-torquing the head bolts few days later after I replaced the head and the head gasket. But, if I have retorqued the bolts few months later, I could've possibly averted this drama and keep the head and gasket fair bit longer. But, a good lesson learnt to check the torque of the headbolts at least once a year, I reckon.

I have few questions if you guys can help with some ideas and explanations.

1)Can you suggest few less harmful ways to remove the soot from the piston crowns (& perhaps wall of the bore)?

2)I couldn't see a massive buildup of soot(my estimation, which may be incorrect) from what I see on the piston crown and cylinder head. So, how did I produce massive compression(180-190psi) when I did the compression test on all the cylinders last time???!!! Compression tester is accurate. Again, I am not 100% certain there is a need for a thick soot buildup for the compression to shoot up by 20psi or so(normal should be around 170psi, which it was last year).

Also, considering the head bolts were loose, compression should have been low.

thanks

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